Passive Door Lock Body Serviceability via Segmented Installation Frame
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Solution Overview
Problem
The existing locking systems for passive door blades in double doors are difficult to service and replace, requiring the removal of the passive door from the hinges, which is cumbersome and costly, especially when space and weather conditions are unfavorable.
Innovation Solution
A locking system comprising a lock body, pull bars, and an installation frame that allows the lock body to be easily installed and removed without detaching the passive door from the hinges, with the installation frame providing attachment means for the pull bars and support parts for the lock body, enabling the lock body to be replaced or serviced on-site without removing the door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the lock body is integrated with the passive door blade, then the locking system is structurally simple, but the lock body cannot be serviced or replaced without removing the entire door
Solution Approach 1:
The locking system is divided into separate functional modules: the lock body (20) can be removed independently from the passive door blade (2), while the pull bars (23, 24) and installation frame (14, 44) remain attached to the door. This segmentation allows the lock body to be serviced or replaced without removing the entire door assembly.
Solution Approach 2:
The lock body (20) is extracted as a separate serviceable component from the passive door blade (2). The attachment parts (30) in the lock body engage with support parts (18) in the installation frame, allowing the lock body to be installed and removed independently while leaving the pull bars and door structure in place.
2Ease of repair
If the pull bars are directly attached to the lock body, then the locking mechanism is simple, but the lock body cannot be removed without removing the pull bars
Solution Approach 1:
The connection between the lock body and pull bars is segmented through the installation frame (14, 44). The pull bars (23, 24) are attached to the installation frame via support parts (18), while the lock body (20) connects to the installation frame through movable attachment parts (30). This segmentation allows the lock body to be removed independently from the pull bars.
Solution Approach 2:
The installation frame (14, 44) acts as an intermediary structure between the pull bars (23, 24) and the lock body (20). The support parts (18) in the installation frame provide attachment points for the pull bars, while the movable attachment parts (30) in the lock body engage with these support parts, enabling independent removal of the lock body while leaving the pull bars attached to the door.
3Ease of repair
If the lock body is removed from the passive door, then the door must be detached from hinges, which requires significant space and time
Solution Approach 1:
The locking system is segmented so that the lock body (20) can be removed independently from the passive door blade (2). The pull bars (23, 24) and installation frame (14, 44) remain attached to the door, allowing the lock body to be serviced without detaching the door from hinges, thereby eliminating the time-consuming door removal and reinstallation process.
Solution Approach 2:
The lock body (20) is extracted as a separate serviceable component that can be removed from the passive door blade (2) without removing the door itself. The attachment parts (30) in the lock body engage with support parts (18) in the installation frame, enabling the lock body to be taken out for servicing while the door remains installed on the hinges.
4Manufacturing precision
If the attachment parts are fixed in position, then the installation is simple, but the pull bars cannot be properly positioned relative to the lock body
Solution Approach 1:
The attachment parts (30) in the lock body are made movable in the height direction, allowing them to adjust their position relative to the support parts (18) in the installation frame. This dynamic capability enables proper positioning of the pull bars (23, 24) during installation and operation, while the attachment parts can still engage securely with the support parts to provide stable connection.
Data Source
Figure 1
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Figure 7
AI summary
The invention comprises a lock body (20) and two pull bars (23, 24). The arrangement further an installation frame (14, 44) for the lock body (20), attachment ends (25) in the ends facing the lock body (20) of the pull bars (23, 24) and an attachment part (30) in the lock body (20).. The installation frame (14, 44) is provided with attachment arrangements (16, 45) for fastening the installation frame to the passive door blade as well as with support parts (18) for the attachment ends (25) of the pull bars. The attachment parts (30) are arranged movably in the height direction of the lock body (20) and the attachment parts comprise mating surfaces (31, 40) for the attachment ends (25).